Not at all. That's just a temporary product that doesn't change the molecular structure of your hair. Something permanent, like a perm or relaxer that permanently alters that portion of the hair until it grows out.

I can't tell ya'.....I don't know much about the 4s. It just appeared to be in the 4s. Maybe go to the 4 board....but I think they'll tell you that the other factors are what matters most when it comes to understanding your hair and what works for it.

Nice it looks like mine but I'm recovering from heat damage so mine has wavy+straight ends while some parts are curled like its suppose to.
I see mostly 3c but I think it also can be 4a..not an expert and don't try to be exact/obsess over what type it is.They use similar products so you should get good results if the technique is right.